Table 3.  Summary statistics of event-mean concentrations of nitrogen from rainfall, Coastal Bend area, south Texas, 199698

[mg/L, milligrams per liter; --, not determined; <, less than]

Constituent

No. of
samples

Arithmetic
mean

Rain-
weighted
mean

Median

Standard
error of
mean

Standard
deviation

Minimum

Maximum

Nitrogen, nitrate, dissolved
(mg/L as N)

39

0.15

0.11

0.14

0.019

0.12

0.02

0.67

Nitrogen, nitrite, dissolved
(mg/L as N)

39

--

--

<.001

--

--

<.001

.01

Nitrogen, ammonia, dissolved
(mg/L as N)

39

.19

.12

.17

.022

.14

.01

.75

Nitrogen, ammonia plus organic,
total (mg/L as N)

39

.25

.15

.20

.031

.19

<.1

.8

Nitrogen, ammonia plus organic,
dissolved (mg/L as N)

39

.23

.15

.20

.029

.18

.01

.8

Nitrogen, total (mg/L as N)

39

.42

.28

.35

.048

.28

.09

1.5

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